searchui/onlinehandler/tsrc/t_bingplugin/inc/onlinesearchplugin.h
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     1 /*
       
     2  * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
       
     3  * All rights reserved.
       
     4  * This component and the accompanying materials are made available
       
     5  * under the terms of "Eclipse Public License v1.0"
       
     6  * which accompanies this distribution, and is available
       
     7  * at the URL "http://www.eclipse.org/legal/epl-v10.html".
       
     8  *
       
     9  * Initial Contributors:
       
    10  * Nokia Corporation - initial contribution.
       
    11  *
       
    12  * Contributors:
       
    13  *
       
    14  * Description:  OnlineSearchPlugin class definition
       
    15  *
       
    16  */
       
    17 
       
    18 #ifndef ONLINESEARCHPLUGIN_H
       
    19 #define ONLINESEARCHPLUGIN_H
       
    20 
       
    21 #include <QObject>
       
    22 
       
    23 /**
       
    24  * @ingroup group_onlinesearchpluginmodel
       
    25  * @brief Represents a plugin plugin in the framework.
       
    26  *
       
    27  * OnlineSearchPlugin is an interface through which setting plugin plugin can be 
       
    28  * executed in the search handlers.
       
    29  *
       
    30  * @lib ?library
       
    31  * @since S60 ?S60_version
       
    32  */
       
    33 
       
    34 class OnlineSearchPlugin : public QObject
       
    35     {
       
    36 Q_OBJECT
       
    37 public:
       
    38 
       
    39     /**
       
    40      * Destructor.
       
    41      * @since S60 ?S60_version.
       
    42      */
       
    43     virtual ~OnlineSearchPlugin()
       
    44         {
       
    45         }
       
    46 
       
    47     /**
       
    48      * Called by the search handlers during initialize cycle of the plugin, it is during
       
    49      * this phase the plugin widget
       
    50      * usually creates its initial view.
       
    51      * Once the initialization is done, pluginInitialized signal must be 
       
    52      * emitted.
       
    53      * @since S60 ?S60_version.
       
    54      */
       
    55     virtual void initializePlugin() = 0;
       
    56 
       
    57     /**
       
    58      * Called by the search handlers when the plugin becomes the current plugin.  
       
    59      * @since S60 ?S60_version.
       
    60      */
       
    61     virtual void activatePlugin() = 0;
       
    62     /**
       
    63      * Called by the search handlers when the plugin becomes the current plugin.  
       
    64      * @since S60 ?S60_version.
       
    65      */
       
    66     virtual void activatePlugin(const QString &searchQuery) = 0;
       
    67 
       
    68     /**
       
    69      * Called by the search handlers when the plugin is no longer being displayed.  
       
    70      */
       
    71     virtual void deactivatePlugin() = 0;
       
    72 
       
    73     /**
       
    74      * Called by the search handlers before the plugin destructor is called.
       
    75      * @param reason The reason why the search handlers is being killed. 
       
    76      */
       
    77     virtual void shutdownPlugin() = 0;    
       
    78 
       
    79 protected:
       
    80 
       
    81     /**
       
    82      * Constructor.
       
    83      * @since S60 ?S60_version.
       
    84      */
       
    85     OnlineSearchPlugin()
       
    86         {
       
    87         }
       
    88 
       
    89 signals:
       
    90 
       
    91     /**
       
    92      * Emit this signal when changing the view inside the plugin.
       
    93      * @param caller The calling plugin plugin instance.
       
    94      * @param viewWidget The new plugin view widget to be shown.
       
    95      */
       
    96     void viewChanged();
       
    97 
       
    98     /**
       
    99      * Emit this signal to indicate initialization is done. 
       
   100      * @param caller The calling plugin plugin instance.
       
   101      * @param success True if succeeded, false otherwise.
       
   102      */
       
   103     void pluginInitialized(bool success);
       
   104 
       
   105     /**
       
   106      * Emit this signal to indicate that the plugin plugin can be deleted. 
       
   107      * Note that this signal does not need to be emitted if true is returned
       
   108      * from shutdownPlugin.
       
   109      * @param caller The calling plugin plugin instance.
       
   110      */
       
   111     void shutdownCompleted(bool success);
       
   112 
       
   113     /**
       
   114      * Called by search handlers when back button is clicked in the plugin view.
       
   115      * In this method the plugin plugin can implement internally showing and
       
   116      * hiding GUI elements if the plugin has multiple 'views'.
       
   117      */
       
   118     void handleBackEvent();
       
   119     };
       
   120 
       
   121 #endif // ONLINESEARCHPLUGIN_H